I need to display the cumulative sum of rows grouped by category.
In my clip I have 100 data which are all defects opened each day .I have created another column called weeks and displayed which week these defects are created . Now, I need to sum up these defects every week eventually displaying the total sum.
example if i have 2 defects last week and 3 defects this week
then the total sum for last week was 2 and this week is 5 .
Can someone help ?